I wrote this book to understand the concept of digital data security using watermarking. The implemented approach in this book is about invisible data hiding using the concept of visual cryptography and histogram based reversible data hiding. The presented approach makes students ease of understanding about video watermarking. This book also describes other hybrid approaches of video watermarking.

This book deals with the contemporary and controversial topic of Environmental Change and National Security. Security encompasses various elements of human security that are going to be affected by the vagaries of environmental change, brought about by the relentless unsustainable development path undertaken by the modern society. The question is no longer about what the interrelations between climate change and security are, but about when they would be acknowledged by the policy-makers, rising above a narrow mindset that sees it as militarisation of the debate, rather than a human security...